Stop-motion for looms.



W. POLLOCK E. S. LING.

STOP MOTION FOR LOOMS.

APPLICATION FILED 00a-.23, 1909.

TH: Namws PErERs ca., wasHlNcroN, n. c.

Patented Mar. 7, 1911.

*UNITED @EAT -i .an entire.,

STOP-MOTION FOR LOOMS.

essere.

To all whom it may concern:

Be it known that we, WILLIAM POLLOGK and ERNEsT SAMUEL LING, subjects of the King of Great Britain and Ireland, and re siding at Townholm Factory, Newmilns, in the county of Ayr, Scotland, have invented certain new and useful Improvements in Stop-Motions for Looms, of which the following is a specification.

This invention relates to gauze and other looms provided with center weft fork stop motion mechanism of known form, and has for its object to so improve the construction of such stop-motion mechanism that it may be used with advantage where in such looms a shuttle carrying two cops or pirns of weft is used, the weft passing out from opposite ends of the shuttle so that they lie one behind the other in the shed. With this known form of stop motion when used in such looms, though one of the weft threads fail, the stop mot-ion, as ordinarily constructed, would not act, as the fork would still be held up by the remaining weft thread; and an imperfect weave might result for a considerable portion of the fabric before the attendant noticed the failure of the weft. To overcome this objection, according to the present invent-ion, there is provided a needle which, through suitable mechanism, is made to project up between the two wefts, through a slot in the shuttle race, and act on the weft thread on one side of it, so that this thread is carried out of the way of the fork oi the stop motion, which is then supported only by the weft thread on the other side of the needle. It is evident that with a shuttle of the type described the two weft threads will each be alternately in front of and behind the needle, depending on the direction of the shot of the shuttle. In the event of the weft thread which supports the fork of the stop motion failing, the stop motion will be free to act and will at once bring the loom to rest in the usual manner. If the other weft thread acted on by the needle fails during a shot, that shot will be completed but the stop motion will act during the return shot, as the weft will not then be in place to hold Specication of Letters Patent.

Application filed October 23, 1909.

Patented Mar. 119m.

Serial No. 524,12fll up the stop motion, thus only one shot will be imperfect before the loom is brought to rest.

In order that the invention and the manner of performing the same may be properly understood there is hereunto appended a sheet of explanatory drawings throughout which like reference symbols indicate like parts and in which- Figure l is a transverse vertical section of parts of a loom suflicient to show the application of the improvements thereto, Figs. 2 and 3 being diagrams showing certain parts in different positions.

As shown in the drawings, the loom is provided with center weft fork stop-motion mechanism of known form, the fork A only of which is shown, and the shuttle A1 carries two cops or pirns of weft A2, A3, the weft passing out from opposite ends of the shuttle, as shown in Fig. 2, so that they lie one behind the other in the shed, B, the chain lines A2, A3, and the dotted lines B1, B2, in this figure showing also that the two weft threads are alternately front and rear threads depending on the direction of the shot of the shuttle A1.

According to the present invention there is provided a needle C the upper part of which is carried in a slot C in the shuttle race C2, its lower end extending through a guide C3 on the lathe sword D and bearing on a lever D1 actuated, as hereinafter described, so as to raise the needle by a cam, D2, on the first-motion shaft, D3, of the loom. A spring, E, held on the needle, C, between collars El, E2 (the first being secured thereon and the second bearing on the under side of the race C2) tends to push the needle downward. A second spring, E3, secured to the collar and to a bracket G, tends to keep the needle at one end of the slot C1 while it is moved to the opposite end of the slot, when required as hereinafter described, by a cord, wire or chain G1, passing over guide pulleys, G2, G3, and secured at one end to the collar E2 and at the other to one end of a second lever H, the opposite end of which is acted on by a second cam H1 on the shaft D3. Then in action and when the shuttle A1 has traveled in the shed B until it is opposite the fork A of the stopmotion mechanism, as shown in Figs. 1 and 2, the cam D2 then acts on the lever D1 so as to cause that lever to raise the needle C against the action of the spring E and make it project through the slot C1 into th-e space between the two wefts A2, A3. Then when the shuttle has traveled still farther the seeond cam H1 acts on the second lever H so that this lever acting through the cord G1 pulls the needle C to the opposite end of the slot C1. The needle in so moving acts on the weft A2 then behine. it, so that this weft is carried out of the way of the fork A of the stop-motion, as shown in Fig. 3, and the fork is then supported only by the weft thread A3 on the front side of the needle C. ln the event of this weft thread A3, which then supports the fork A failing, the stopmotion is free to act and bring the loom to rest in the usual manner. 1f the other-weft thread, A2, acted on bv the needle, C, as hereinbefore described, fails during this shot, the shot will be completed, but the stop-motion will act during the return shot as the weft A2 which should have been in ront will not then be in place to hold up the weft fork A, thus only one shot will be imperfect before the loom is brought to rest. Then a shot is completed the cams, D2, H1, have relieved the levers D1, H, so that the spring E is free to lower the needle in the slot C1 and the spring E3 to pull the needle to the other end of the slot, and when the beat-up is completed the parts are thus in a position ready to act as hereinbefore described, when the return shot takes place.

Having now described our invention what we claim as new and desire to secure by Letters Patent is 1- 1. In a loom in which two weft threads are shot concurrently, a stop motion, a movable member for controlling the stop motion, means for holding said movable member in its inoperative position by contact with the said threads alternately, and means for holding the remaining thread away from the movable member.

Q. 1n a loom, a shuttle carrying two cops of weft thread, a needle, a stop motion, a movable member controlling the stop motion, means for holding said movable member in its inoperative position by contact with first one and then the other of the two weft threads, and means for operating the needle to keep the remaining weft thread from engagement with the movable member.

3. 1n a loom, a shuttle carrying two cops of weft thread, a shuttle race, a slot in said shuttle race, a stop motion, a movable member controlling the stop motion, means for holding said movable member in its inoperative position by contact with first one and then the other of the two weft threads, a

needle working in said slot, and means for operating the needle to keep the remaining weft thread from engagement with the movable member.

a. In a loom, a shuttle carrying two cops of weft thread, a needle, a stop motion, a pivoted member controlling the stop motion, means for holding said pivoted meniber in its inoperative position by contact with rst one and then the other of the two weft threads, means for moving the needle into a position between the two weft threads during the movement of the shuttle, and means for then moving the needle laterally to keep the remaining weft thread from engagement with the pivoted member.

5. In a loom, a shuttle carrying two cops of weft thread, a shuttle race, a. slot in said race, a needle, a stop motion, a pivoted forked member controlling the stop motion, means for holding said forked member in its inoperative position by contact with first one and then the other of the two weft threads, means for moving the needle through the slot into a position between the two weft threads and also between the arms of the forked member during the movement of the shuttle, and means for then moving the needle laterally in the slot to keep the remaining weft thread from engagement with the forked member.

6. In a loom, a shuttle carrying two cops of weft thread, a needle, a stop mot-ion, a movable member controlling the stop motion, means for holding said movable member in its inoperative position by contact with first one and then the other of the two weft threads, and cam actuated means for operating the needle to keep the remaining weft thread from engagement with the movable member.

7. In a loom, a shuttle carrying two cops of weft thread, a needle, a stop motion, a movable member for controlling the stop motion, means for holding said movable member in its inoperative position by convact with first one and then the other of the two weft threads, means for moving the needle into a position between the two weft threads during the movement of the shuttle, means for then moving the needle laterally to keep the remaining weft thread from engagement with the movable member, and spring means for returning the needle to its normal position.

8. 1n a loom, a reciprocating shuttle carrying two cops of weft thread, a stop motion, a movable member for controlling the4 stop motion, means for holding said movable member in its inoperative position by contact with one of the weft threads during the movement of the shuttle in one direction, means forA keeping the other weft thread from engagement with the movable member during said movement of the shuttle, and means upon the movement of the signatures in the presence of two subscribshnttle in the reverse direction for causing ing Witnesses. the thread previously engaging the movable VILLIAM POLLOCK. member to disengage it and the thread previ- ERNEST SAMUEL LING. 5 ously disengaged from the movable member to engage it.

In testimony whereof We hereunto afliX our Witnesses:

JAMES PoLLooK, JANET TODD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

